Wireless LCA Determination via Sector Masking
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Solution Overview
Problem
Existing methods for determining whether a call in a wireless network is a local call are inefficient due to large mapping tables with overlapping Local Calling Areas (LCAs) and varying MSC/cellsiteID formats, leading to complex searches and maintenance challenges.
Innovation Solution
An improved LCA determination system using a processing system and a mapping data structure that masks sector identifiers, reducing the number of entries and enabling faster searches by grouping LCA identifiers with switch/cell identifiers, allowing for efficient identification of home LCAs without multiple searches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mapping tables include individual entries for each MSC/cellsiteID with sector identifiers to accurately map to LCAs, then measurement precision is improved, but device complexity increases due to large table size and multiple searches required
Solution Approach 1:
The patent segments the MSC/cellsiteID by masking out the sector identifier portion, creating a simplified key that maps to multiple LCA IDs. This segmentation reduces the mapping table size while maintaining accurate LCA identification through the reduced LCA ID set.
2Measurement precision
If mapping tables include separate entries for each sector of cell sites in multiple LCAs, then measurement precision is improved, but loss of time increases due to multiple searches required
Solution Approach 1:
The patent merges multiple LCA identifiers into a reduced LCA ID set that is associated with the masked MSC/cellsiteID. This consolidation allows the system to retrieve all relevant LCA identifiers in a single search operation, eliminating the need for multiple sequential searches while maintaining complete and accurate LCA identification.
3Adaptability or versatility
If mapping tables are expanded to cover all cell sites and sectors, then adaptability is improved, but ease of manufacture worsens due to complex maintenance
Solution Approach 1:
The patent changes the parameter structure of the mapping table by removing the sector identifier from the key and consolidating multiple LCA identifiers into a reduced set. This parameter change simplifies the table structure, making it easier to maintain and update while preserving the ability to handle diverse network configurations and new cell sites.
Data Source
AI summary
Systems and methods are disclosed that determine whether incoming calls are in a home local calling area (LCA) in a wireless network. One embodiment comprises an LCA determination system that includes a processing system and a mapping data structure. The mapping data structure includes a plurality of entries that map a switch/cell identifier (e.g., an MSC/cellsiteID) to a set of LCA identifiers. For a call in a wireless network, the processing system receives a switch/cell identifier, masks the sector identifier from the switch/cell identifier, and searches the mapping data structure based on the masked switch/cell identifier to identify an associated set of LCA identifiers. The processing system then compares the set of LCA identifiers to a subscriber profile to determine if an LCA identifier matches. If there is a match, then the processing system determines that the call is in a home LCA.